Kneeling Elbow To Knee Side Plank Crunch

Kneeling Elbow To Knee Side Plank Crunch Exercise Description

The kneeling elbow to knee side plank crunch is a bodyweight side-plank variation that targets the lateral core while reducing load through the legs. With the bottom knee on the floor, you build anti-lateral-flexion strength and pelvic stability through the external and internal obliques, transverse abdominis, and quadratus lumborum. The supporting shoulder and scapular stabilizers (especially the serratus anterior and rotator cuff) work to keep the shoulder stacked and stable. Bringing the top elbow toward the top knee adds a controlled dynamic component, engaging the hip flexors and upper obliques while you maintain a lifted pelvis. It’s a beginner-friendly option to learn side-plank alignment, trunk bracing, and hip positioning without the full lever length of a straight-leg side plank.

Muscle Groups: Abs, Obliques, Waist
Target Muscles: External Obliques, Internal Obliques
Assisting Muscles: Quadratus Lumborum
Stabilizing Muscles: Infraspinatus, Serratus Anterior, Subscapularis, Transversus Abdominis
Body Area: Upper Body
Body Parts: Core
Body Surface: Side
Body Symmetry: Unilateral
Equipment: Bodyweight
Exercise Patterns: Other
Exercise Type: Strength
Functional Grouping: Trunk Lateral Flexors, Trunk Rotators
Joint Involvement: Multi-joint
Muscle Location: Deep Side Abs, Side Abs
Movement Direction: Other
Muscle Position: Lateral
Gender: Female

How To Do The Kneeling Elbow To Knee Side Plank Crunch Exercise

‘- Lie on your side with knees stacked and bent about 90 degrees; place the bottom forearm on the floor, elbow directly under the shoulder.
– Set the top hand lightly behind your head; align head, ribcage, and pelvis; eyes forward.
– Press the forearm into the floor, engage the glutes and brace the abdomen, then lift hips until your body forms a straight line from head to knees.
– Keep shoulders stacked and the bottom shoulder “packed” (gentle scapular depression and protraction); avoid shrugging.
– Exhale and draw the top knee toward your chest while bringing the top elbow toward that knee; keep the pelvis lifted and square—do not rotate or let the hips drop.
– Inhale and return with control to the straight-line side plank, maintaining a neutral neck and steady shoulder position.
– Throughout, keep ribs down, spine neutral, and avoid pulling on the head with the hand.
– Lower the hips to the floor only after completing your intended number of controlled repetitions on one side before switching.

Kneeling Elbow To Knee Side Plank Crunch Tips

‘- Stack your knees and bend them about 90 degrees with the bottom elbow directly under the shoulder before lifting.
– Place the top hand lightly behind your head, keeping head, ribcage, and pelvis aligned with eyes forward.
– Press the bottom forearm into the floor, engage the glutes, and brace the abdomen to lift hips into a straight line from head to knees.
– Keep shoulders vertically stacked and the bottom shoulder “packed” with gentle depression and protraction to avoid shrugging.
– As you move, keep the supporting shoulder directly over the elbow so the shoulder joint stays stacked and stable.
– On the crunch, exhale and bring the top knee toward your chest and top elbow toward that knee while keeping the pelvis lifted and square.
– Do not let the hips drop or the torso rotate as the elbow and knee come together.
– Inhale as you return with control to the straight-line side plank, maintaining a neutral neck and steady shoulder position.
– Keep ribs down and spine neutral throughout to maintain solid trunk bracing.
– Lower the hips to the floor only after completing your intended number of controlled reps on one side, then switch.

Kneeling Elbow To Knee Side Plank Crunch Beginner Introduction

The kneeling elbow to knee side plank crunch is a bodyweight version of the side plank that emphasizes the side abs and overall core without placing as much demand on the legs. With the lower knee resting on the floor, the body resists tipping sideways, which challenges the deep abs, side abs, and the muscles along the side of the lower back that help steady the pelvis. This setup offers a way to practice a solid side-plank position, with the trunk aligned and supported, while shortening the lever compared with a straight-leg variation.

As the top elbow and top knee move toward each other, the exercise shifts from a static hold into a more dynamic core movement. This motion increases work through the hip flexors and upper side abs, while the lifted hip position is maintained. At the same time, the supporting shoulder, upper back, and rotator cuff contribute to shoulder joint control, helping the upper body stay organized over the forearm. Overall, it serves as an approachable path into side-plank training with added core coordination.